ABSTRACT
This paper presents a homogeneous system of magnetic colloidal particles that self-assembles via two structural patterns of different symmetry. Based on a qualitative comparison between a real magnetic particles system, analytical calculations and molecular dynamics simulations, it is shown that bistability can be achieved by a proper tailoring of an anisotropic magnetization distribution inside the particles. The presented bistability opens new possibilities to form two-dimensionally extended and flexible structures where the connectivity between the particles can be changed in vivo.
ABSTRACT
The stability of full-arch alginate impressions that had been immersed in one of two disinfecting solutions was assessed by measuring stone casts poured from the alginate impressions. Statistically significant dimensional changes occurred, when compared with master casts, but only by 1 mm or less, a clinically insignificant amount.